下面是给出的基类Animal声明和main()函数。
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- class Animal
- {
- public:
- virtual void cry()
- {
- cout<<"不知哪种动物,让我如何学叫?"<<endl;
- }
- };
- int main( ){
- Animal *p;
- p = new Animal();
- p->cry();
- Mouse m1("Jerry",‘m‘);
- p=&m1;
- p->cry();
- Mouse m2("Jemmy",‘f‘);
- p=&m2;
- p->cry();
- Cat c1("Tom");
- p=&c1;
- p->cry();
- Dog d1("Droopy");
- p=&d1;
- p->cry();
- Giraffe g1("Gill",‘m‘);
- p=&g1;
- p->cry();
- return 0;
- }
程序的运行结果将是:
1、根据给出的main()函数和运行结果的提示,设计出相关的各个类,注意观察运行结果,提取出每个类中需要的数据成员,并匹配上需要的成员函数。
代码
#include <iostream> using namespace std; class Animal { public: virtual void cry() { cout<<"不知哪种动物,让我如何学叫?"<<endl; } }; class Mouse:public Animal { protected: string name; char sex; public: Mouse(string n,char s):name(n),sex(s){} void cry() { cout<<"我叫"<<name<<",是一只"; if(sex=='f') cout<<"女"; else cout<<"男"; cout<<"老鼠,我的叫声是:吱吱吱!"<<endl; } }; class Cat:public Animal { protected: string name; public: Cat(string n):name(n){} void cry() { cout<<"我叫"<<name<<",是一只猫,我的叫声是:喵喵喵!"<<endl; } }; class Dog:public Animal { protected: string name; public: Dog(string n):name(n){} void cry() { cout<<"我叫"<<name<<",是一条狗,我的叫声是:汪汪汪!"<<endl; } }; class Giraffe:public Animal { protected: string name; char sex; public: Giraffe(string n,char s):name(n),sex(s){} void cry() { cout<<"我叫"<<name<<",是"; if(sex=='m') cout<<"男"; else cout<<"女"; cout<<"长颈鹿,我的脖子太长,发不出声音来!"<<endl; } }; int main( ){ Animal *p; p = new Animal(); p->cry(); Mouse m1("Jerry",'m'); p=&m1; p->cry(); Mouse m2("Jemmy",'f'); p=&m2; p->cry(); Cat c1("Tom"); p=&c1; p->cry(); Dog d1("Droopy"); p=&d1; p->cry(); Giraffe g1("Gill",'m'); p=&g1; p->cry(); return 0; }
运行结果:
时间: 2024-10-24 03:16:55